package com.lightman.gulimall.product.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.lightman.common.constant.ProductConstant;
import com.lightman.common.utils.PageUtils;
import com.lightman.common.utils.Query;
import com.lightman.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.lightman.gulimall.product.dao.AttrDao;
import com.lightman.gulimall.product.dao.AttrGroupDao;
import com.lightman.gulimall.product.dao.CategoryDao;
import com.lightman.gulimall.product.entity.AttrAttrgroupRelationEntity;
import com.lightman.gulimall.product.entity.AttrEntity;
import com.lightman.gulimall.product.entity.AttrGroupEntity;
import com.lightman.gulimall.product.entity.CategoryEntity;
import com.lightman.gulimall.product.service.AttrService;
import com.lightman.gulimall.product.service.CategoryService;
import com.lightman.gulimall.product.vo.AttrGroupRelationVo;
import com.lightman.gulimall.product.vo.AttrRespVo;
import com.lightman.gulimall.product.vo.AttrVo;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

    @Autowired
    private AttrAttrgroupRelationDao relationDao;

    @Autowired
    private AttrGroupDao attrGroupDao;

    @Autowired
    private CategoryDao categoryDao;

    @Autowired
    private CategoryService categoryService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    @Transactional
    @Override
    public void saveAttr(AttrVo attr) {
        // 首先保存基本信息
        AttrEntity attrEntity = new AttrEntity();
        // 通过spring 提供的copy将 页面数据, copy 到 attrEntity
        BeanUtils.copyProperties(attr, attrEntity);
        // 报错基本数据
        this.save(attrEntity);

        if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()
                && attr.getAttrGroupId() != null) {

            // 其次保存,关联信息
            AttrAttrgroupRelationEntity attrAttrgroupRelationEntity = new AttrAttrgroupRelationEntity();

            // 属性分组的id
            attrAttrgroupRelationEntity.setAttrGroupId(attr.getAttrGroupId());
            // 属性id
            attrAttrgroupRelationEntity.setAttrId(attrEntity.getAttrId());
            relationDao.insert(attrAttrgroupRelationEntity);
        }

    }

    @Override
    public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId) {
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>().eq("attr_type", 1);

        if (catelogId != 0) {
            queryWrapper.eq("catelog_id", catelogId);
        }

        // 检索条件
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            // attr_id attr_name
            queryWrapper.and((wrapper) -> {
                wrapper.eq("attr_id", key).or().like("attr_name", key);
            });
        }

        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                queryWrapper);

        PageUtils pageUtils = new PageUtils(page);

        // 得到分页列表记录
        List<AttrEntity> records = page.getRecords();

        List<AttrRespVo> respVos = records.stream().map((attrEntity) -> {
            AttrRespVo attrRespVo = new AttrRespVo();

            // 把当前attrEntity copy 到 attrRespVo中
            BeanUtils.copyProperties(attrEntity, attrRespVo);

                // 设置访分类和分组的名字
                AttrAttrgroupRelationEntity attrId = relationDao.selectOne(
                        new QueryWrapper<AttrAttrgroupRelationEntity>()
                                .eq("attr_id", attrEntity.getAttrId()));// 查询中间表

                if (attrId != null && attrId.getAttrGroupId() != null) { // 如果中间表查询到这一条数据
                    Long attrGroupId = attrId.getAttrGroupId();  // 拿到中间表的分组id

                    // 通过中间表的分组id 查询到对应的分组信息
                    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrGroupId);

                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }

            // 查询分类信息  分类表主键查询   分组对应的getCatelogId
            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());

            if (categoryEntity != null) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }
            return attrRespVo;
        }).collect(Collectors.toList());

        pageUtils.setList(respVos);

        return pageUtils;
    }

    @Override
    public PageUtils querSaleAttrPage(Map<String, Object> params, Long catelogId) {
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>().eq("attr_type", 0);

        if (catelogId != 0) {
            queryWrapper.eq("catelog_id", catelogId);
        }

        // 检索条件
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            // attr_id attr_name
            queryWrapper.and((wrapper) -> {
                wrapper.eq("attr_id", key).or().like("attr_name", key);
            });
        }

        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                queryWrapper);

        PageUtils pageUtils = new PageUtils(page);

        // 得到分页列表记录
        List<AttrEntity> records = page.getRecords();

        List<AttrRespVo> respVos = records.stream().map((attrEntity) -> {
            AttrRespVo attrRespVo = new AttrRespVo();

            // 把当前attrEntity copy 到 attrRespVo中
            BeanUtils.copyProperties(attrEntity, attrRespVo);

            // 设置访分类和分组的名字
            AttrAttrgroupRelationEntity attrId = relationDao.selectOne(
                    new QueryWrapper<AttrAttrgroupRelationEntity>()
                            .eq("attr_id", attrEntity.getAttrId()));// 查询中间表

            if (attrId != null && attrId.getAttrGroupId() != null) { // 如果中间表查询到这一条数据
                Long attrGroupId = attrId.getAttrGroupId();  // 拿到中间表的分组id

                // 通过中间表的分组id 查询到对应的分组信息
                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrGroupId);

                attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
            }

            // 查询分类信息  分类表主键查询   分组对应的getCatelogId
            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());

            if (categoryEntity != null) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }
            return attrRespVo;
        }).collect(Collectors.toList());

        pageUtils.setList(respVos);

        return pageUtils;
    }

    @Override
    public AttrRespVo getAttrInfo(Long attrId) {
        // 要返回前台的对象信息
        AttrRespVo respVo = new AttrRespVo();
        // 当前属性的详细信息
        AttrEntity attrEntity = this.getById(attrId);

        // 将查询到的信息copy到 respVo上
        BeanUtils.copyProperties(attrEntity, respVo);


        // 当前属性为基本属性,才可以设置分组
        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {

            // 设置分组信息
            AttrAttrgroupRelationEntity attrgroupRelation = relationDao.selectOne(
                    new QueryWrapper<AttrAttrgroupRelationEntity>()
                            .eq("attr_id", attrId));

            if (attrgroupRelation != null) {
                respVo.setAttrGroupId(attrgroupRelation.getAttrGroupId());

                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(
                        attrgroupRelation.getAttrGroupId());

                if (attrGroupEntity != null) {
                    respVo.setGroupName(attrGroupEntity.getAttrGroupName()); // 分组名称
                }
            }

        }


        // 设置分类信息
        Long catelogId = attrEntity.getCatelogId();
        Long[] catelogPath = categoryService.findCatelogPath(catelogId);
        respVo.setCatelogPath(catelogPath);
        CategoryEntity categoryEntity = categoryDao.selectById(catelogId);
        if (categoryEntity != null) {
            respVo.setCatelogName(categoryEntity.getName());
        }

        return respVo;
    }


    @Transactional
    @Override
    public void updateAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        this.updateById(attrEntity);

        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
            //1、修改分组关联
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();

            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attr.getAttrId());

            Integer count = relationDao.selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
            if (count > 0) {

                relationDao.update(relationEntity, new UpdateWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));

            } else {
                relationDao.insert(relationEntity);
            }
        }
    }

    /**
     * 根据分组id, 查找关联的所有 基本属性
     *
     * @param attrgroupId
     * @return
     */
    @Override
    public List<AttrEntity> getRelationAttr(Long attrgroupId) {

        // 在中间表中根据分组id 查询到attr_id , 然后根据attr_id 在attr表中查询相关数据
        List<AttrAttrgroupRelationEntity> relationEntities = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>()
                .eq("attr_group_id", attrgroupId));

        List<Long> attrIds = relationEntities.stream().map((attr) -> {
            return attr.getAttrId();
        }).collect(Collectors.toList());

        if (attrIds == null || attrIds.size() == 0) {
            return null;
        }

        Collection<AttrEntity> attrEntities = this.listByIds(attrIds);
        return (List<AttrEntity>) attrEntities;
    }

    @Override
    public void deleteAttrgroupRelationEntity(AttrGroupRelationVo... vos) {
//        relationDao.delete(new QueryWrapper<>().eq("attr_id", 1L).eq("attr_group_id", 1L));
        // 批量删除
        List<AttrAttrgroupRelationEntity> entities = Arrays.asList(vos).stream().map((item) -> {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(item, relationEntity);
            return relationEntity;
        }).collect(Collectors.toList());

        relationDao.deleteBatchRelation(entities);

    }

    /**
     * 获取当前分组没有关联的所有属性
     * @param params
     * @param attrgroupId
     * @return
     */
    @Override
    public PageUtils getNoRelationAttr(Map<String, Object> params, Long attrgroupId) {
        //1、当前分组只能关联自己所属的分类里面的所有属性
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
        Long catelogId = attrGroupEntity.getCatelogId();
        //2、当前分组只能关联别的分组没有引用的属性
        //2.1)、当前分类下的其他分组
        List<AttrGroupEntity> group = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>().eq("catelog_id", catelogId));
        List<Long> collect = group.stream().map(item -> {
            return item.getAttrGroupId();
        }).collect(Collectors.toList());

        //2.2)、这些分组关联的属性
        List<AttrAttrgroupRelationEntity> groupId = relationDao.selectList(
                new QueryWrapper<AttrAttrgroupRelationEntity>()
                        .in("attr_group_id", collect));

        List<Long> attrIds = groupId.stream().map(item -> {
            return item.getAttrId();
        }).collect(Collectors.toList());

        //2.3)、从当前分类的所有属性中移除这些属性；
        QueryWrapper<AttrEntity> wrapper = new QueryWrapper<AttrEntity>()
                .eq("catelog_id", catelogId)
                .eq("attr_type", ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());

        if (attrIds != null && attrIds.size() > 0) {
            wrapper.notIn("attr_id", attrIds);
        }
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            wrapper.and((w) -> {
                w.eq("attr_id", key).or().like("attr_name", key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), wrapper);

        PageUtils pageUtils = new PageUtils(page);

        return pageUtils;
    }

    @Override
    public List<Long> selectSearchAttrIds(List<Long> attrIds) {

        return this.baseMapper.selectSearchAttrIds(attrIds);

    }
}